package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import javassist.bytecode.SignatureAttribute;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import net.sf.jsqlparser.expression.DateTimeLiteralExpression;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    /*  切入点*/
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointcut() {
    }

    /*前置通知,为公共字段赋值*/
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) {
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill =  methodSignature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();//获得注解的值
        Object[] agrs = joinPoint.getArgs();
        if (agrs == null || agrs.length == 0) {
            return;
        }
        Object entity = agrs[0];
//获得拦截到的方法
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();
        //准备公共的数值
        //
        try {
            if (operationType == OperationType.INSERT) {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateUser.invoke(entity,id);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,id);
                setCreateTime.invoke(entity,now);
            } else if (operationType == OperationType.UPDATE) {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,id);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        log.info("开始公共字段填充");
    }

    ;


}
